Try making the following modifications to your template, which should fix the issue. Both changes are in the templates/payontime_14_09_2009/css/template.css file
Line 1602, for the .art-Post-body div, comment out the z-index setting by putting a /* and */ around it.
Line 1504, for the .art-Post style, comment out the z-index style here as well:
Hopefully, that your styling issues, but if it causes other issues, let us know.
As for the Like error your getting, it seems like the Open Graph image tag for your articles is using an image that's too small. If you have the "Use first image in article for default" in the Open Graph tab of the Social configuration area, JFBConnect will try to set the first image of the article as the Open Graph tag (to be used in a user's wall as the image for what they Like'd). If that image is too small, you'll get the error above. You may want to add the following tags to your article to specify the best image to use for each article:
{JFBCGraph image=http://site.com/best-image.jpg}
You can also set a default site-wide image (good for a logo) in the Open Graph tab by adding the following line:
image=http://site.com/logo.jpg
For more about JFBConnect's Open Graph features, see:
www.sourcecoast.com/jfbconnect/features/...pen-graph-for-joomla
Hope that helps!
Alex